maybe should find a time to go down as well...... last nite, I try again, it happen again... but after a while, its okay...... realise if I focus in dark area..... it just freeze..... but after turning once or twice, okay again.... haaaa.... siao siao one... just afraid bring to SC... then the lens decide to work... dont know how to explain....
You can take video recording and show to the sc?